General

• Region (Map) : .................. Pacific Northwest
• State (Map) ........................ Oregon
• County ................................ Umatilla, Morrow
• Project: ................................ Umatilla
• Dam type: ........................... Earthfill
• Location: ............................ 6 mi. S of Pendleton
• Watercourse: ..................... McKay Creek
• Reservoir: ........................... McKay
• Construction Date: ............1922-1926
• National ID Number .......... OR00583
• Hydrologic Unit Code ......

Dimensions

• Crest Elevation of Dam: .......................   1330 ft
• Structural Height of Dam: ......................   165 ft
• Crest Length: .......................................     2700 ft
• Top of Joint Use: ........................................ x.0 ft
• Top of Active Conservation: ................... x.0 ft
• Top of Inactive Conservation: ................. x.0 ft
• Spillway Crest: ............................................ x.0 ft
• Top of Dead Storage: ................................ x.0 ft
• Streambed at Dam Axis : ........................... x.0 ft

Hydraulics

• Normal Water Surface Elev: ............... 1317.1 ft
• Hydraulic Height: ....................................... x.0 ft
• Service Spillway Type:
•    Uncontrolled  Crest    ................................Yes
•    Morning-Glory ........................................... No
•    Crest Length    .......................................... xx ft
•    Gated      ....................................................... No
•    Capacity at Elev:  1322 ft,                27,000 cfs
• Auxiliary Spillway ......................................... No
•     Capacity at Elev.   .................................. 0 cfs
• Outlet Works Capacity at
•     Elevation  1322 ft.,  .......................... 1,500 cfs  

Hydrology

• Drainage Area: ................................. 186 sq mi
• Hydrometeorological Report      HMR
• Flood Type: ...............................General
• Storm Duration: .......................................  hrs
• Probable Maximum Flood (PMF) Report:
•   Peak Inflow: ..................................  cfs
•   Inflow Volume: ........................  acre-ft
•   Flow Duration: ......................................0 days
•   PMF Routing MWS Elev.: ................. x.0 ft
•   Initial Routing Elev: ............................ x.0 ft
•   Study Date: